American Popular Music from the end of the Swing Era

Trace and explain the developments in American Popular Music from the end of the Swing Era (approx. 1940) to the emergence of Rock 'n' Roll (approx. 1955). There are many ways to tackle this assignment, including avoiding music theory and parlance altogether. You may look at Americans' relationship to music, or you may look at the music per se, or even focus on the personalities most closely associated with popular music. It can be on anything related to must, specifically jazz, rock n roll or the blues. I'm attaching an essay that my friend wrote that you can use as a model. Ideally, it should be a page and a half.      

Sample Solution